Steps to reproduce: # Have "Video Background Playback Fix" addon installed # Open a video on Youtube # Lock phone (video keeps playing) # Wait ~5 minutes Actual results: # Video stops playing after ~5 minutes # Unlocking the phone resumes video Tried rebooting phone and reinstalling the VBPF addon, also tried reinstalling Firefox, these did not fix the problem. Expected results: # Video should keep playing in background In addition to the above, playback controls are no longer shown for Youtube in the notification area. They still work for other media, eg. Soundcloud. This used to work for me in the past few years. Phone is on Android 10, I have not updated it or changed any settings recently. (Reported as https://bugzilla.mozilla.org/show_bug.cgi?id=1827045 , but maybe this is not a bug but a hidden setting somewhere that I accidentally changed?)